Seiko Cal. 0771 - 931

Seiko 0771-931

The Seiko 0771-931 represents an important milestone in Seiko's 1972 lineup. Powered by the 0771 caliber with 34j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-22806f1856bd]

Also known as: Sumo

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
44mm
Case Thickness
14.3mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
120m
Dial Color
Black
Jewels
34j
Frequency
21,600 bph
Power Reserve
54 hours
Year
1972

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seikata-wm-22806f1856bd